[gentoo-user] Auto-mounting USB drive?

[gentoo-user] Auto-mounting USB drive?

[Mark Knecht]

Hi,
   I'm wondering what I need to read about and do to get a USB drive
to auto-mount reliably at boot time? I don't know anything about udev
so I tried what I thought used to work in my /etc/fstab file but it
doesn't work. The drive mounts by hand just fine:

MacMini linux # cat /etc/fstab | grep video
/dev/sda1		/video		ext3		auto,rw		0 2
MacMini linux # df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda4             75890040  60601600  11433376  85% /
udev                     10240       164     10076   2% /dev
shm                     257396         0    257396   0% /dev/shm
MacMini linux # mount /dev/sda1 /video
MacMini linux # df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda4             75890040  60601604  11433372  85% /
udev                     10240       164     10076   2% /dev
shm                     257396         0    257396   0% /dev/shm
/dev/sda1            157566568    192068 149370520   1% /video
MacMini linux #

   Must I use udev (and if so how - what do I study to make this work)
or can I do this in fstab and I've just forgotten something simple?

   Also, what's the feeling these days about the reliability of
automounting by device? Would I be better to use e2label on the
partition?

Thanks in advance,
Mark

Re: [gentoo-user] Auto-mounting USB drive?

[Jarry]

Mark Knecht wrote:
> Hi,
>    I'm wondering what I need to read about and do to get a USB drive
> to auto-mount reliably at boot time?

Try this:
http://www.gentoo.org/doc/en/usb-guide.xml

I do not use usb-automounting now, but I tested it some time ago
on my laptop, and it worked well. Just follow that guide...

Jarry
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Re: [gentoo-user] Auto-mounting USB drive?

[Mark Knecht]

On Mon, May 25, 2009 at 12:11 PM, Jarry <mr.jarry@gmail.com> wrote:
> Mark Knecht wrote:
>>
>> Hi,
>>   I'm wondering what I need to read about and do to get a USB drive
>> to auto-mount reliably at boot time?
>
> Try this:
> http://www.gentoo.org/doc/en/usb-guide.xml
>
> I do not use usb-automounting now, but I tested it some time ago
> on my laptop, and it worked well. Just follow that guide...
>
> Jarry

Thanks. Looks like a good start. I appreciate it.

Cheers,
Mark

Re: [gentoo-user] Auto-mounting USB drive?

[Альфар]

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2009/5/25 Mark Knecht <markknecht@gmail.com>

> Hi,
>   I'm wondering what I need to read about and do to get a USB drive
> to auto-mount reliably at boot time? I don't know anything about udev
> so I tried what I thought used to work in my /etc/fstab file but it
> doesn't work. The drive mounts by hand just fine:
>
> MacMini linux # cat /etc/fstab | grep video
> /dev/sda1               /video          ext3            auto,rw         0 2
> MacMini linux # df
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/hda4             75890040  60601600  11433376  85% /
> udev                     10240       164     10076   2% /dev
> shm                     257396         0    257396   0% /dev/shm
> MacMini linux # mount /dev/sda1 /video
> MacMini linux # df
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/hda4             75890040  60601604  11433372  85% /
> udev                     10240       164     10076   2% /dev
> shm                     257396         0    257396   0% /dev/shm
> /dev/sda1            157566568    192068 149370520   1% /video
> MacMini linux #
>
>   Must I use udev (and if so how - what do I study to make this work)
> or can I do this in fstab and I've just forgotten something simple?
>
>   Also, what's the feeling these days about the reliability of
> automounting by device? Would I be better to use e2label on the
> partition?
>
> Thanks in advance,
> Mark
>
>

run *lsusb –v*

you will see somethin like this

*Bus 003 Device 010: ID 152d:2338*

*Device Descriptor:*

*...dVendor           0x152d*

*  idProduct          0x2338*

*  bcdDevice            1.00*

*  **iManufacturer           1*

*  iProduct                2*

*  iSerial                 5*

*  bNumConfigurations      1*
Now make file /etc/udev/rule.d/z98-usb-flash.rules with this content

*SUBSYSTEM**=="block**", SYSFS**{idProduct**}=="2338",
SYSFS**{idVendor**}=="152d**", NAME**="name**" **RUN+="/bin/mount
/dev/name /media/name"*

*
Change idProduct and idVendor and to your data. And name too. With
this name your device will apear in /dev. And of course mkfir
/media/name
*

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Re: [gentoo-user] Auto-mounting USB drive?

[Stroller]

On 25 May 2009, at 20:23, Альфар wrote:
> ...
> Now make file /etc/udev/rule.d/z98-usb-flash.rules with this content
> SUBSYSTEM=="block", SYSFS{idProduct}=="2338",  
> SYSFS{idVendor}=="152d", NAME="name" RUN+="/bin/mount /dev/name / 
> media/name"
>
>
>
> Change idProduct and idVendor and to your data. And name too. With  
> this name your device will apear in /dev. And of course mkfir /media/ 
> name

I hope you won't be offended, but this seems a whole load more complex  
than the OP's single line in /etc/fstab, which really ought to work.

Of course /etc/fstab is no good if the drive's going to be plugged &  
unplugged at whim throughout the day - I know there are better ways to  
do that - but I would be bothered, myself, why something's not working  
as it _so obviously_ ought to.

Mark: yes, I don't see any reason NOT to address by label (e2label or  
whatever XFS / Reiser use) these days. The only thing I can think of  
is that your USB drivers or the kernel module that does USB mass- 
storage is not loaded in time during boot. Aren't there any messages  
about failed mounts amongst the kernel messages on the screen?

Stroller.

Re: [gentoo-user] Auto-mounting USB drive?

[Neil Bothwick]

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On Tue, 26 May 2009 05:35:46 +0100, Stroller wrote:

> Mark: yes, I don't see any reason NOT to address by label (e2label or  
> whatever XFS / Reiser use) these days. The only thing I can think of  
> is that your USB drivers or the kernel module that does USB mass- 
> storage is not loaded in time during boot. Aren't there any messages  
> about failed mounts amongst the kernel messages on the screen?

That's most likely the problem, I had a similar situation trying to mount
an SD card at boot time. Two solutions are to mount the device later in
the boot sequence, from /etc/conf.d/local, or to build the necessary
modules into the kernel. Since you're mounting the USB device on boot,
there's no point in having separate modules for USB.


-- 
Neil Bothwick

This is as bad as it can get; but don't bet on it.

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Re: [gentoo-user] Auto-mounting USB drive?

[Mark Knecht]

On Tue, May 26, 2009 at 12:53 AM, Neil Bothwick <neil@digimed.co.uk> wrote:
> On Tue, 26 May 2009 05:35:46 +0100, Stroller wrote:
>
>> Mark: yes, I don't see any reason NOT to address by label (e2label or
>> whatever XFS / Reiser use) these days. The only thing I can think of
>> is that your USB drivers or the kernel module that does USB mass-
>> storage is not loaded in time during boot. Aren't there any messages
>> about failed mounts amongst the kernel messages on the screen?
>
> That's most likely the problem, I had a similar situation trying to mount
> an SD card at boot time. Two solutions are to mount the device later in
> the boot sequence, from /etc/conf.d/local, or to build the necessary
> modules into the kernel. Since you're mounting the USB device on boot,
> there's no point in having separate modules for USB.
>
>
> --
> Neil Bothwick

Stroller & Neil,
   Thanks. I don't know why but I hadn't considered the idea that the
USB driver would be better built into the kernel for this application.
Basically, this is a little PowerPC Mac Mini that I've turned into a
new HD Homerun/USB video storage MythTV backend server. I want to be
pretty confident that the hard drive is mounted because the machine is
headless and sitting in a corner. If someone turns it on after a power
failure I don't want to have to mess around to get the external
storage mounted. I don't need the drive mounted at boot time, but I
certainly want it up and running before the mythbackend script gets
started. If I get a power failure and someone restarts everything it
could be in the middle of a previous recording and I need the partial
recording to end up on USB.

   I'll look at building in the USB driver into the kernel and using
e2label also.

   I did actually manage to get it working using some udev rules that
I found in the forum, but I must say I don't really understand them
and never thought they were necessary. I'm glad you guys are thinking
the same way.

Thanks,
Mark